Hard difficultySuccessfully complete story mode under the normal difficulty setting.

Unlockable PeicesSpecial GBA Maniac Peices:

Unlockable:

How to Unlock:

Head Peice 17

Sonic Advance GBA cartridge

Head Peice 20

Sonic Pinball Party GBA cartridge

Head Peice 21

Sonic Battle GBA cartridge

Girl without topEnter the DS system language option and change it to "Japanese". The girl on the menu screen will no longer have her top.

Alternately, complete the game under the hell difficulty setting.

Bonus hairstylesHave one of the following Game Boy Advance in the cartridge slot along with the game to unlock a new hairstyle in Maniac mode:

Unlockable:

How to Unlock:

Chao hairstyle

Sonic Advance 3

NiGHTS hairstyle

Sonic Pinball Party

NiGHTS hairstyle

Chu Chu Rocket

Puyo hairstyle

Puyo Pop

Sonic hairstyle

Sonic Advance 1

Sonic hairstyle

Sonic Advance 2

Ulala hairstyle

Sonic Battle

Ulala's Cosmic Attack

Space Channel 5

Birthday greetingThe girl will greet you by saying "Happy Birthday" at the main menu on the date that you entered as your birthday in the system settings.

UnlockablesManiac Mode - Heads:

Unlockable:

How to Unlock:

Chao Wig

Complete Hell Mode

Lilac Ponytail

Find 1 rabbit

Long Blonde Hair with Blue Ribbon

Find 19 rabbits

Long Blonde Hair with Police Hat

Get 130 stars and find 40 rabbits

Long Blue Hair

Find 49 rabbits

Long Blue Hair with Cowgirl Hat

Complete Hard Mode

Long Brown Hair with Nurse's Hat

Get 100 stars and find 30 rabbits

Long Brown Hair with White Visor

Find 6 rabbits

Long Grey Hair

Available from start of game

Long Grey Hair with Chicken Hat

Get 100 stars and find 35 rabbits

Long Grey Hair with Red and White Hat

Find 29 rabbits

Long Grey Hair with Santa Hat

Complete Hard Mode

Long Grey Hair with White Bunny Ears

Find 59 rabbits

Long Orange Hair

Find 5 rabbits

Long Pink Hair with Halo

Get 182 stars and find 60 Rabbits

Long Purple Hair with White Cap

Find 39 rabbits

NiGHTS Wig

Complete Hell Mode

Puyo Wig

Complete Hell Mode

Short Green Hair

Find 3 rabbits

Sonic Wig

Complete Hell Mode

Ulala Wig

Complete Hell Mode

TrickThis cheat can be found on the menu where you select the mini-game of your choice where the girl is standing to the left! Just simply "TOUCH" her! She'll react in different ways depending on where you touch her!

Holiday greetingsSet the system date to December 25, January 1, and other holidays to hear a new greeting.

Credits soundsTouch the Sega logo during the credits to hear the classic "Sega" sound. Touching other text and images that appear will result in other sounds. After the credits and theme song ends, touch the person sleeping in the audience to hear him snore.

Unlockable OutfitsUnlock Maniac Mode Outfits:

Unlockable:

How to Unlock:

Angel's Costume and Wings

Get 182 stars and find 60 rabbits

Blue and White Dress

Get 75 stars

Blue and White Schoolgirl Uniform

Get 20 stars

Blue Chicken Outfit

Get 100 stars and find 35 rabbits

Blue Dress

Available from start of game

Blue Polo Shirt and White Skirt

Get 15 stars

Cheerleader Uniform

Get 10 stars

Cowgirl Outfit

Complete Hard Mode

Green and White Armor

Get 170 stars and find 55 rabbits

Green Schoolgirl Outfit

Get 182 stars

Green Top and Brown Shorts

Get 30 stars

Grey and White Dress

Get 100 stars

Nude!

Complete Hell Mode

Orange and White Dress

Get 130 stars

Pink Dress

Complete Normal Mode

Pink Top and Bunny Tail Shorts

Get 50 stars

Police Uniform

Get 130 stars and find 40 rabbits

Red and White Christmas Outfit

Complete Hard Mode

Red Swimming Costume

Get 170 stars

White Bikini and Denim Hotpants

Complete Normal Mode

White Nurse Uniform

Get 100 stars and find 30 rabbits

Unlockable ShoesUnlock Maniac Mode Shoes:

Unlockable:

How to Unlock:

Bare Feet

Complete Hell Mode

Blue High Heel Shoes

Available from start of game

Blue Knee-High Boots

Find 9 rabbits

Brown Shoes with Long White Socks

Find 31 rabbits

Cowgirl Boots

Complete Hard Mode

Green and White Armored Boots

Get 170 stars and find 55 rabbits

Green Elf Boots

Get 51 stars

Purple High Heel Shoes

Find 7 rabbits

Red High Heel Shoes

Find 4 rabbits

White High Heel Shoes

Find 2 rabbits

White High Heel Shoes and Blue Leg Warmers

Get 41 stars

White Knee-High Boots

Find 11 rabbits

White Trainers

Find 21 rabbits

Body 2 and 3Successfully complete story mode under the normal difficulty setting.

Sound testSuccessfully complete story mode under the normal difficulty setting.

Defeating Plants BossGo to the right-hand or left-hand corner of the level and remain there patiently. Eventually a vine will come down inches away from you, but not quite hitting you. Just burn it and go back to the corner. Needless to say, you should be as close to it as possible. The vines cannot hit you if you are tucked in a corner well enough. Eventually you will begin throwing your stakes of fire into the creature's mouth. And as for this part; do them one at a time if needed. It is better than losing one third of your health just from hitting his teeth once.

Carts levelLook on the top screen to see which lane the person is flying down. Then, pay close attention and firmly stroke a straight line down the path the man in the cart will soon come through. Every spike-ball will move just enough for the cart to get by. This level is otherwise nearly impossible to complete.

Alternate girl costumesFind all the hidden rabbits.

Carts levelLook on the top screen to see which lane the person is flying down. Then, pay close attention and firmly stroke a straight line down the path the man in the cart will soon come through. Every spike-ball will move just enough for the cart to get by. This level is otherwise nearly impossible to complete.

Hell difficultySuccessfully complete story mode under the hard difficulty setting.

Hell modeTo unlock Hell mode, beat Story mode on the Hard difficulty.

Opening soundsTouch the girl in various places at the mode selection screen and she will scream.

Custom title screen soundHold [Down] + (Y) at the title screen and record any sound into the microphone. The recorded clip will play during the introduction music. To preview it, press [Down] + (X) at the title screen. To hear it slower, press [Down/Left] + (X) and to hear it faster, press [Down/Right] + (X) at the title screen.